Recommend LDO please?

[P.K. Mishra]

Hi!

Can you please recommend a LDO IC for a USB/Li-polymer Battery power for the nRf51822 please? The LDO needs to drive the nRf51822 and a couple of sensors such as Gyro and an Accelerometer.

Thanks! P.K.

[Håkon Alseth]

Hi,

We do not use many LDOs in our reference designs, so it's hard to recommend any regulators from our side. If your other peripherals needs 3.3V, I would just go with a LDO that has a set output of 3.3V. These can be found at any regulator manufacturer.

Best regards Håkon

[Carlos]

Take a look on this part

LTC3554

www.linear.com/.../LTC3554

Is a very good candidate

Regards

Carlos

[Erland Lewin]

For high efficiency at low currents, you might also want to look at the LTC3388:

www.linear.com/.../LTC3388

/Erland

[Janek Mann]

Alternatively, if your application is cost-constrained (Linear parts don't come cheap), a generic footprint LDO in sot23-5 is a sensible option (like TPS76433DBVT). Of course you'll have to check the datasheet yourself to make sure that the specs are appropriate for your actual circuit design :)

[Christopher Mason]

I'm using LTC3554 in a design with the nRF1822 and generally like it . Be aware that datasheet has some confusion around how to disable the NTC thermistor -- see the example board circuit -- you need a pair of resistors.